Vulnerability in Libssh
CVE-2023-6918
A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.014 (71.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Libssh
- Fedoraproject Fedora — versions 38, 39
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 0:0.9.6-14.el8
- Red Hat Enterprise Linux 9 — versions 0:0.10.4-13.el9
- Red Hat Enterprise Linux — versions 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2024:2504 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:3233 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2023-6918 (Mailing List, vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
- www.libssh.org/2023/12/18/libssh-0-10-6-and-libssh-0-9-8-security-releases/ (Release Notes)
- www.libssh.org/security/advisories/CVE-2023-6918.txt (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-6918?
- CVE-2023-6918 is a low-severity vulnerability in Libssh, classified under CWE-252. CVSS score: 3.7/10. Published 2023-12-19.
- How severe is CVE-2023-6918?
- Low severity. CVSS v3 base score is 3.7 out of 10.
- Is CVE-2023-6918 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.